Stop Memorizing Code Books. Start Solving.
Master NEC, IMC, ASHRAE & SMACNA codes through addictive puzzles rooted in real-world installations. Built for UA, IBEW & SMACNA apprentices.
6 Puzzle Types
Learn by Doing, Not Reading
Every puzzle is rooted in real installation scenarios. Every explanation cites the actual code section.
88 puzzlesWhat's Wrong?
Spot code violations in real installations. Tap the component that doesn't meet code.
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73 puzzlesWhat's Missing?
Identify missing components from a complete-looking install before it fails inspection.
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60 puzzlesBuild the Assembly
Drag and drop parts into the correct assembly order. Get the sequence wrong, it won't pass.
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139 puzzlesSize It Right
Calculate correct component sizing using real formulas from ASHRAE, NEC, and SMACNA standards.
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83 puzzlesSequence the Install
Reorder shuffled installation steps. Real-world sequencing matters on the jobsite.
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142 puzzlesCode or No Code?
Does this scenario pass inspection or not? Binary judgment calls rooted in actual code sections.
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Your Trade. Your Code. Your Puzzles.
5 core trades free. 5 premium specialty trades for advanced cross-trade knowledge.
Core Trades — Free
How It Works
Five Minutes a Day Builds Real Code Knowledge
01Pick Your Trade
Choose from HVAC, Plumbing, Electrical, Pipefitting, Controls, and 5 premium specialties.
02Solve Real Puzzles
Every puzzle is based on real installation scenarios from actual construction project specs and plans.
03Learn the Code
Every answer explanation cites the actual code section — NEC, IMC, ASHRAE, SMACNA. You learn the 'why' behind every answer.
Real Standards
Every Answer Cites the Actual Code
No generic trivia. Every puzzle references real code standards used on the jobsite. After each puzzle, you see the exact code section, correct vs. incorrect diagrams, and why it matters.
Gamification
Earn Your Stripes
Track your journey from 1st Year to Master with XP, streaks, achievements, and leaderboard rankings.
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Pricing
Start Free. Go Pro When You're Ready.
Free
- ✓3 puzzles per day
- ✓Difficulty levels 1-2
- ✓All 5 core trades
- ✓Progress tracking
- ✓Daily code tips
Pro
or $79.99/year Save 33%
- ✓Unlimited puzzles
- ✓All difficulty levels
- ✓All 10 trades (base + specialty)
- ✓Full code reference library
- ✓Spaced repetition reviews
- ✓Priority support
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